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a2dp source demo: update docu
This commit is contained in:
Milanka Ringwald
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commit
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@ -42,7 +42,7 @@
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*/
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// *****************************************************************************
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/* EXAMPLE_START(a2dp_sink_demo): Receive audio and control playback.
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/* EXAMPLE_START(a2dp_sink_demo): Receive audio stream and control its playback.
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*
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* @text This A2DP Sink example demonstrates how to use the A2DP Sink service to
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* receive an audio data stream from a remote A2DP Source device. In addition,
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@ -227,7 +227,7 @@ static uint8_t media_sbc_codec_configuration[] = {
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* - handle_pcm_data - handles PCM audio frames. Here, they are stored a in wav file if STORE_SBC_TO_WAV_FILE is defined, and/or played using the PortAudio library if HAVE_PORTAUDIO is defined.
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*/
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/* LISTING_START(MainConfiguration): Setup Audio Sink and AVRCP services */
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/* LISTING_START(MainConfiguration): Setup Audio Sink and AVRCP Controller services */
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static void a2dp_sink_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t * event, uint16_t event_size);
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static void avrcp_controller_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size);
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static void handle_l2cap_media_data_packet(uint8_t seid, uint8_t *packet, uint16_t size);
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@ -42,11 +42,12 @@
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*/
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// *****************************************************************************
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/* EXAMPLE_START(a2dp_source_demo): A2DP Source Demo
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/* EXAMPLE_START(a2dp_source_demo): Serve audio stream and handle remote playback control and queries.
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*
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* @text This A2DP Source example demonstrates how to send
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* an audio to a remote A2DP Sink device, and, if HAVE_BTSTACK_STDIN is defined,
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* how to switch between two audio data sources.
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* @text This A2DP Source example demonstrates how to send an audio data stream
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* to a remote A2DP Sink device and how to switch between two audio data sources.
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* In addition, the AVRCP Target is used to answer queries on currently played media,
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* as well as to handle remote playback control, i.e. play, stop, repeat, etc.
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*/
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// *****************************************************************************
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@ -61,6 +62,9 @@
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#include "hxcmod.h"
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#include "mods/mod.h"
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#define AVRCP_BROWSING_ENABLED 0
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#define NUM_CHANNELS 2
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#define A2DP_SAMPLE_RATE 44100
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#define BYTES_PER_AUDIO_SAMPLE (2*NUM_CHANNELS)
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@ -109,7 +113,6 @@ static const int16_t sine_int16[] = {
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-19260, -17557, -15786, -13952, -12062, -10126, -8149, -6140, -4107, -2057,
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};
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static const char * device_name = "A2DP Source Demo 00:00:00:00:00:00";
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static btstack_packet_callback_registration_t hci_event_callback_registration;
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// mac 2011: static const char * device_addr_string = "04:0C:CE:E4:85:D3";
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@ -124,6 +127,8 @@ static const char * device_addr_string = "00:21:3C:AC:F7:38";
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static bd_addr_t device_addr;
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static uint8_t sdp_a2dp_source_service_buffer[150];
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static uint8_t sdp_avrcp_target_service_buffer[200];
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static uint8_t media_sbc_codec_configuration[4];
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static a2dp_media_sending_context_t media_tracker;
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@ -184,7 +189,6 @@ typedef struct {
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// python -c "print('a'*512)"
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static const char title[] = "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa";
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avrcp_track_t tracks[] = {
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{{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01}, 1, "Sine", "Generated", "AVRCP Demo", "monotone", 12345},
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{{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02}, 2, "Nao-deceased", "Decease", "AVRCP Demo", "vivid", 12345},
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@ -195,6 +199,76 @@ avrcp_play_status_info_t play_info;
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/* AVRCP Target context END */
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/* @section Main Application Setup
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*
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* @text The Listing MainConfiguration shows how to setup AD2P Source and AVRCP Target services.
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*/
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/* LISTING_START(MainConfiguration): Setup Audio Source and AVRCP Target services */
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static void a2dp_source_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t * event, uint16_t event_size);
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static void avrcp_target_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size);
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#ifdef HAVE_BTSTACK_STDIN
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static void stdin_process(char cmd);
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#endif
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static int a2dp_source_and_avrcp_services_init(void){
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// Register for HCI events.
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hci_event_callback_registration.callback = &a2dp_source_packet_handler;
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hci_add_event_handler(&hci_event_callback_registration);
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l2cap_init();
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// Initialize A2DP Source.
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a2dp_source_init();
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a2dp_source_register_packet_handler(&a2dp_source_packet_handler);
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// Create stream endpoint.
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avdtp_stream_endpoint_t * local_stream_endpoint = a2dp_source_create_stream_endpoint(AVDTP_AUDIO, AVDTP_CODEC_SBC, media_sbc_codec_capabilities, sizeof(media_sbc_codec_capabilities), media_sbc_codec_configuration, sizeof(media_sbc_codec_configuration));
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if (!local_stream_endpoint){
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printf("A2DP source demo: not enough memory to create local stream endpoint\n");
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return 1;
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}
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media_tracker.local_seid = avdtp_local_seid(local_stream_endpoint);
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// Initialize AVRCP Target.
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avrcp_target_init();
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avrcp_target_register_packet_handler(&avrcp_target_packet_handler);
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// Initialize SDP,
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sdp_init();
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// Create A2DP source service record and register it with SDP.
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memset(sdp_a2dp_source_service_buffer, 0, sizeof(sdp_a2dp_source_service_buffer));
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a2dp_source_create_sdp_record(sdp_a2dp_source_service_buffer, 0x10002, 1, NULL, NULL);
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sdp_register_service(sdp_a2dp_source_service_buffer);
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// Create AVRCP target service record and register it with SDP.
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memset(sdp_avrcp_target_service_buffer, 0, sizeof(sdp_avrcp_target_service_buffer));
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avrcp_target_create_sdp_record(sdp_avrcp_target_service_buffer, 0x10001, AVRCP_BROWSING_ENABLED, 1, NULL, NULL);
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sdp_register_service(sdp_avrcp_target_service_buffer);
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// Set local name with a template Bluetooth address, that will be automatically
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// replaced with a actual address once it is available, i.e. when BTstack boots
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// up and starts talking to a Bluetooth module.
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gap_set_local_name("A2DP Source Demo 00:00:00:00:00:00");
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gap_discoverable_control(1);
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gap_set_class_of_device(0x200408);
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hxcmod_initialized = hxcmod_init(&mod_context);
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if (hxcmod_initialized){
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hxcmod_setcfg(&mod_context, A2DP_SAMPLE_RATE, 16, 1, 1, 1);
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hxcmod_load(&mod_context, (void *) &mod_data, mod_len);
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printf("loaded mod '%s', size %u\n", mod_name, mod_len);
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}
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// Parse human readable Bluetooth address.
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sscanf_bd_addr(device_addr_string, device_addr);
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#ifdef HAVE_BTSTACK_STDIN
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btstack_stdin_setup(stdin_process);
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#endif
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return 0;
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}
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/* LISTING_END */
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static void a2dp_demo_send_media_packet(void){
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int num_bytes_in_frame = btstack_sbc_encoder_sbc_buffer_length();
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int bytes_in_storage = media_tracker.sbc_storage_count;
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@ -310,7 +384,7 @@ static void a2dp_demo_timer_stop(a2dp_media_sending_context_t * context){
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btstack_run_loop_remove_timer(&context->audio_timer);
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}
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static void packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){
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static void a2dp_source_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){
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UNUSED(channel);
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UNUSED(size);
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uint8_t status;
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@ -583,48 +657,9 @@ int btstack_main(int argc, const char * argv[]);
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int btstack_main(int argc, const char * argv[]){
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(void)argc;
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(void)argv;
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// register for HCI events
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hci_event_callback_registration.callback = &packet_handler;
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hci_add_event_handler(&hci_event_callback_registration);
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l2cap_init();
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// Initialize AVDTP Source
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a2dp_source_init();
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a2dp_source_register_packet_handler(&packet_handler);
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avdtp_stream_endpoint_t * local_stream_endpoint = a2dp_source_create_stream_endpoint(AVDTP_AUDIO, AVDTP_CODEC_SBC, media_sbc_codec_capabilities, sizeof(media_sbc_codec_capabilities), media_sbc_codec_configuration, sizeof(media_sbc_codec_configuration));
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if (!local_stream_endpoint){
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printf("A2DP source demo: not enough memory to create local stream endpoint\n");
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return 1;
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}
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media_tracker.local_seid = avdtp_local_seid(local_stream_endpoint);
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// Initialize AVRCP Target
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avrcp_target_init();
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avrcp_target_register_packet_handler(&avrcp_target_packet_handler);
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// Initialize SDP
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sdp_init();
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memset(sdp_a2dp_source_service_buffer, 0, sizeof(sdp_a2dp_source_service_buffer));
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a2dp_source_create_sdp_record(sdp_a2dp_source_service_buffer, 0x10002, 1, NULL, NULL);
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sdp_register_service(sdp_a2dp_source_service_buffer);
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gap_set_local_name(device_name);
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gap_discoverable_control(1);
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gap_set_class_of_device(0x200408);
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hxcmod_initialized = hxcmod_init(&mod_context);
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if (hxcmod_initialized){
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hxcmod_setcfg(&mod_context, A2DP_SAMPLE_RATE, 16, 1, 1, 1);
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hxcmod_load(&mod_context, (void *) &mod_data, mod_len);
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printf("loaded mod '%s', size %u\n", mod_name, mod_len);
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}
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// parse human readable Bluetooth address
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sscanf_bd_addr(device_addr_string, device_addr);
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#ifdef HAVE_BTSTACK_STDIN
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btstack_stdin_setup(stdin_process);
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#endif
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int err = a2dp_source_and_avrcp_services_init();
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if (err) return err;
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// turn on!
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hci_power_control(HCI_POWER_ON);
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return 0;
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